- Cirsium cymosum
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Cirsium cymosum Scientific classification Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots (unranked): Asterids Order: Asterales Family: Asteraceae Tribe: Cynareae Genus: Cirsium Species: C. cymosum Binomial name Cirsium cymosum
(Greene) J.T.HowellCirsium cymosum is a species of thistle known by the common name peregrine thistle. It is native to California, where it grows in several types of mountain and foothill habitat, and its range extends just into Oregon. This native thistle is a biennial or perennial herb with a maximum height just over a meter. It is coated in soft and coarse hairs and sometimes cobwebby fibers. The spiny leaves may reach 30 to 50 centimeters long, especially toward the base of the stem. They are deeply cut into lobes which are lined with sharp teeth. The inflorescence is a cluster of flower heads each up to 3 centimeters long and 5 wide. The head is lined with sticky, spiny phyllaries and filled with dull white flowers. The fruit is an achene with a dark-colored body just under a centimeter long and a pappus of hairs up to 2.5 centimeters in length.
Cirsium canovirens, the graygreen thistle, is sometimes treated as a variety of this species.[1]
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